Engine cooling device for a fork lift truck

Abstract

The utility model relates to the technical field of engine heat dissipation, specifically relates to a fork -mounted car engine heat dissipation device, including the casing, the casing inside can hold the engine, the casing inside is equipped with the radiator, the radiator and engine are along the longitudinal direction distribution in the casing inside, the casing inside is equipped with the baffle, the baffle board surface is vertically arranged, the baffle one side board surface is toward the radiator, the baffle other side board surface is toward the installation position of engine, the baffle is frame -like structure, the baffle is used for plugging the gap between radiator and casing inner wall, the baffle can divide the casing inside space into the air inlet area and the air outlet area along the longitudinal direction, the present application is through setting up the frame -like baffle of vertical, makes the baffle plugging the gap between radiator and casing inner wall, and does not influence the work of radiator, and then divides the casing inside into the air inlet area and the air outlet area along the longitudinal direction, solves the problem that the existing technology engine and radiator are not isolated and lead to the air outlet heat backflow to the air inlet area.

Description

Technical Field

[0001] This utility model relates to the field of engine cooling technology, specifically to an engine cooling device for forklift trucks. Background Technology

[0002] In the current field of telescopic boom forklift technology, the engine, as the core power source, directly affects the working efficiency and service life of the entire machine due to its heat dissipation performance.

[0003] When the engine is transversely mounted, in order to effectively save lateral space, the industry generally separates the radiator from the engine assembly and arranges it independently. However, this results in more piping and requires a separate motor to drive the radiator for cooling, which increases costs.

[0004] In contrast, a longitudinally mounted engine can directly drive the radiator via a transmission mechanism, eliminating the need for an additional drive motor, thus reducing piping and lowering costs. Typically, in a longitudinally mounted layout, the engine and radiator are integrated into a single housing, with separate air inlets and outlets. The radiator is usually located on the inlet side, and the engine on the outlet side. The design logic is to draw fresh air in through the radiator, exchange heat during the airflow, and finally exhaust it through the outlet. For example, patent CN104810980A discloses a similar cooling solution. However, in this patent's cooling solution and similar longitudinally mounted cooling solutions used in telescopic forklifts in the prior art, the engine and radiator are not effectively spatially isolated within the housing. Heat from the exhaust air is easily drawn back into the radiator's intake duct with the airflow, mixing with fresh air before entering the radiator. This causes the temperature of the air drawn into the radiator to rise, significantly reducing cooling efficiency. Utility Model Content

[0005] To address the technical problem in existing longitudinally mounted engine cooling solutions where the engine and radiator are not effectively isolated within the housing, allowing exhaust heat to be easily re-drawn into the radiator's intake duct, leading to increased air temperature and reduced cooling efficiency, this invention provides an engine cooling device for forklift trucks.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A forklift engine cooling device includes a housing that can accommodate an engine. A radiator is installed inside the housing, and the radiator and engine are distributed longitudinally inside the housing. An isolation plate is installed inside the housing, with the plate surface vertically arranged. One side of the isolation plate faces the radiator, and the other side faces the engine mounting position. The isolation plate has a frame structure and is used to seal the gap between the radiator and the inner wall of the housing. The isolation plate can divide the internal space of the housing longitudinally into an air inlet area and an air outlet area.

[0007] By adopting the above structural solution, a vertical frame-type isolation plate is installed to seal the gap between the radiator and the inner wall of the housing without affecting the operation of the radiator. This longitudinally divides the interior of the housing into an air intake zone and an air outlet zone, effectively solving the problem in existing technologies where the lack of isolation between the engine and radiator causes heat from the outlet air to flow back into the air intake zone. In this application, fresh air enters the radiator from the air intake zone, the radiator cools the engine, and after heat exchange, the hot air is discharged from the air outlet zone. The isolation plate prevents hot air from flowing back into the air intake zone through gaps and mixing with fresh air, ensuring effective and efficient heat dissipation.

[0008] As a preferred implementation of an engine cooling device for a forklift truck, an isolation plate is installed on the edge of the radiator. The isolation plate includes an upper baffle, a side baffle, and a lower baffle. The upper baffle is installed on the top of the radiator, the lower baffle is installed on the bottom of the radiator, and the side baffle is installed on the side of the radiator in the lateral direction.

[0009] With the above structural design, the isolation plate consists of an upper baffle, a side baffle, and a lower baffle, which correspond to the top, lateral side, and bottom of the radiator, respectively. This allows the isolation plate to fully cover the edge area of ​​the radiator, ensuring that the upper, lower, and side gaps between the radiator and the casing are sealed. This prevents air from flowing between the air inlet and outlet areas through uncovered gaps, thus enhancing the integrity and reliability of the spatial separation.

[0010] As a preferred implementation of an engine cooling device for forklift trucks, the upper baffle, side baffle, and lower baffle are all provided with clip rubber strips at the edges away from the radiator, and the clip rubber strips abut against the inner wall of the housing.

[0011] By adopting the above structural solution, by setting clip rubber strips on the edges of the upper baffle, side baffle, and lower baffle away from the radiator, and by having the clip rubber strips abut against the inner wall of the housing, the tiny gaps between the upper baffle, side baffle, and lower baffle and the inner wall of the housing caused by processing or installation errors can be filled, thereby further enhancing the sealing and isolation effect between the air inlet and outlet areas and preventing air leakage.

[0012] As a preferred implementation of an engine cooling device for a forklift truck, the housing is open on one side in the lateral direction and installed on the side of the chassis, with the inner wall of the housing and the side of the chassis together forming the internal space of the housing.

[0013] By adopting the above structural scheme, the chassis structure is fully utilized as part of the shell, which simplifies the overall structure of the shell, reduces manufacturing costs, and saves the lateral space of the forklift, thus adapting to the compact layout requirements of telescopic boom forklifts.

[0014] As a preferred implementation of an engine cooling device for forklift trucks, the radiator is mounted on the side of the chassis in the lateral direction.

[0015] With the above structural design, the radiator is directly mounted on the side of the chassis on one side, using the chassis as a rigid support, which improves the installation stability of the radiator and avoids displacement or damage to the radiator due to vehicle vibration.

[0016] As a preferred implementation of an engine cooling device for forklift trucks, the radiator has a sponge on the side of the chassis in the lateral direction, and the sponge abuts against the side of the chassis.

[0017] With the above structural design, the sponge between the radiator and the side of the chassis can fill the gaps caused by machining accuracy or installation errors, preventing cold air in the air intake area and hot air in the air outlet area from flowing through the gaps, further enhancing the sealing of the connection between the radiator and the chassis, and improving the overall isolation effect in conjunction with the isolation plate to ensure heat dissipation efficiency.

[0018] As a preferred implementation of an engine cooling device for a forklift truck, the housing includes a box and an engine cover; the box includes a horizontally arranged base plate, one side of which is connected to the side of the chassis in the transverse direction, and the other side of which is perpendicularly connected to a support plate in the transverse direction; a front baffle and a rear baffle are respectively connected to the two sides of the base plate in the longitudinal direction, the front baffle being located in the air intake area and the rear baffle being located in the air outlet area; the support plate is connected to the front baffle and the rear baffle on both sides in the longitudinal direction; the engine cover includes a horizontally arranged top plate, one side of which is rotatably connected to the chassis in the transverse direction, and the other side of which is perpendicularly connected to a side panel; the rotation of the top plate in the transverse direction can drive the side panel to rotate synchronously to close and open the box.

[0019] The aforementioned structural design, with its separate housing and hood, facilitates quick access to the internal engine and radiator for inspection and maintenance, enhancing ease of maintenance. The hood is rotatably connected to the chassis via a top plate, allowing for convenient opening and closing. When closed, the hood fits tightly against the housing, ensuring a tight seal and maintaining the independence of the air intake and exhaust zones.

[0020] As a preferred implementation of an engine cooling device for forklift trucks, a vent plate is provided on the inner side of the front baffle, the vent plate is parallel to the front baffle, the front baffle has an air guide opening opposite to the vent plate, and an inclined air guide plate is provided inside the air guide opening.

[0021] With the above structural design, the air vents and inclined air deflectors on the front baffle guide external cold air precisely to the vent plate, increasing the airflow into the intake area and improving the radiator's heat exchange efficiency. The inclined design of the air deflector blocks mud, water, and debris splashed out by the rear tires during vehicle operation, preventing vent plate blockage and ensuring unobstructed airflow. The vent plate is set parallel to the front baffle, further filtering impurities in the air, protecting the radiator, and evenly distributing the airflow into the intake area.

[0022] As a preferred implementation of an engine cooling device for forklift trucks, the rear panel has an air outlet; the side panel has a full ventilation opening, which is connected to the air outlet area; a full ventilation plate is detachably installed inside the full ventilation opening, and the full ventilation plate has several heat dissipation holes.

[0023] With the above structural design, the rear panel's air outlet and the side panel's full ventilation openings form multiple air outlet channels, allowing hot air from the outlet area to quickly escape from the casing and preventing heat buildup. The full ventilation panel is removable, facilitating cleaning, ensuring unobstructed airflow, and simplifying maintenance. The full ventilation openings only connect to the outlet area, ensuring directional exhaust of hot air and preventing cross-flow with the inlet area, thus maintaining heat dissipation efficiency.

[0024] As a preferred implementation of an engine cooling device for forklift trucks, the top plate has a semi-ventilation opening that spans the air inlet and air outlet areas. A semi-ventilation plate is detachably connected inside the semi-ventilation opening. Several heat dissipation holes are opened in the area of ​​the semi-ventilation plate opposite to the air inlet area. The area of ​​the semi-ventilation plate opposite to the air outlet area is fully enclosed.

[0025] With the above structural design, a second heat dissipation hole is opened in the area opposite the air intake zone of the semi-ventilation plate, increasing the air intake path and improving the amount of cold air drawn in. The area opposite the air outlet zone of the semi-ventilation plate is completely enclosed, preventing hot air from the air outlet zone from flowing directly back to the air intake zone through the semi-ventilation hole, thus avoiding the radiator drawing in air with an elevated temperature. The semi-ventilation plate is removable for easy maintenance, ensuring unobstructed airflow and facilitating inspection.

[0026] The beneficial effects of this utility model include: This invention uses a vertical frame-type isolation plate to seal the gap between the radiator and the inner wall of the housing without affecting the operation of the radiator. This effectively solves the problem of heat from the exhaust flowing back to the intake area due to the lack of isolation between the engine and the radiator in the prior art.

[0027] In this invention, fresh air enters the radiator from the air intake area, the radiator cools the engine, and after heat exchange is completed, hot air is discharged from the air outlet area. The baffle plate can prevent hot air from flowing back into the air intake area through the gap and mixing with fresh air, thus ensuring the heat dissipation effect and efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a forklift engine cooling device according to a specific embodiment of the present utility model; Figure 2 This is a schematic diagram of the radiator structure in a specific embodiment of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the clip adhesive strip on the edge of the upper baffle in a specific embodiment of this utility model; Figure 4 This is a schematic diagram of the radiator structure in a specific embodiment of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the structure of the box in a specific embodiment of the present utility model; Figure 6 This is a schematic diagram of the structure of the breathable plate in a specific embodiment of this utility model; Figure 7 This is a schematic diagram of the air guide plate in a specific embodiment of the present utility model; Figure 8 This is a schematic diagram of the structure of the machine cover in a specific embodiment of this utility model; Figure 9 This is a schematic diagram of the structure of the fully ventilated panel in a specific embodiment of this utility model; Figure 10 This is a schematic diagram of the structure of the semi-ventilated plate in a specific embodiment of this utility model.

[0030] List of components and reference numerals: 1. Shell; 11. Housing; 111. Bottom plate; 112. Support plate; 113. Front baffle; 114. Rear baffle; 115. Air outlet; 116. Air guide; 117. Air guide plate; 118. Ventilation plate; 12. Engine cover; 121. Top plate; 122. Side panel; 123. Full ventilation opening; 124. Full ventilation plate; 125. Heat dissipation hole one; 126. Half ventilation opening; 127. Half ventilation plate; 128. Heat dissipation hole two; 2. Engine; 3. Radiator; 4. Isolation plate; 41. Upper baffle; 42. Side baffle; 43. Lower baffle; 44. Clip rubber strip; 5. Sponge; 6. Air inlet area; 7. Air outlet area; 8. Chassis. Detailed Implementation

[0031] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Reference Figure 1-10 This embodiment proposes an engine cooling device for forklift trucks. Figure 1 The direction of arrow X is longitudinal, and the direction of arrow Y is transverse. This embodiment of a forklift engine cooling device includes a housing 1. The housing 1 is open on one side in the transverse direction and is mounted on the side of the chassis 8. The inner wall of the housing 1 and the side of the chassis 8 together form the internal space of the housing 1. (Refer to...) Figure 1 The housing 1 includes a box 11 and a cover 12; see reference. Figure 1 and Figure 5 The housing 11 includes a horizontally arranged base plate 111. One side of the base plate 111 is connected to the side of the chassis 8 in the transverse direction, and the other side of the base plate 111 is perpendicularly connected to the support plate 112 in the transverse direction. A front baffle 113 and a rear baffle 114 are respectively connected to both sides of the base plate 111 in the longitudinal direction. The support plate 112 is respectively connected to the front baffle 113 and the rear baffle 114 in the longitudinal direction. (Refer to...) Figure 1 and Figure 8 The engine cover 12 includes a horizontally arranged top plate 121. One side of the top plate 121 is rotatably connected to the chassis 8 in the horizontal direction, and the other side of the top plate 121 is perpendicularly connected to the side panel 122 in the horizontal direction. The rotation of the top plate 121 can drive the side panel 122 to rotate synchronously to close and open the housing 11. Furthermore, the opening and closing of the engine cover 12 can be achieved by a gas spring. When the engine cover 12 is closed, it can cooperate with the housing 11 to wrap and protect the internal engine 2, radiator 3 and other components, thereby improving the overall aesthetics of the machine.

[0033] Reference Figure 1 The housing 1 can accommodate the engine 2. A radiator 3 is located inside the housing 1. The radiator 3 and the engine 2 are distributed longitudinally within the housing 1. One side of the radiator 3 is mounted to the side of the chassis 8 in the transverse direction. Additionally, refer to... Figure 4 The radiator 3 has a sponge 5 on the side of the chassis 8 in the lateral direction. The sponge 5 abuts against the side of the chassis 8. The sponge 5 can be used to fill the gap between the radiator 3 and the side of the chassis 8 caused by installation error.

[0034] Reference Figure 1 and Figure 2The housing 1 contains an internal partition plate 4. The partition plate 4 is vertically positioned, with one side facing the radiator 3 and the other side facing the mounting position of the engine 2. The partition plate 4 is located between the radiator 3 and the engine 2. The partition plate 4 has a frame structure and is used to seal the gap between the radiator 3 and the inner wall of the housing 1. The partition plate 4 longitudinally divides the internal space of the housing 1 into an air intake zone 6 and an air outlet zone 7. The air intake zone 6 is the air intake space, and the air outlet zone 7 is the space where heat from the engine 2 is discharged from the housing 1. By effectively separating the air intake zone 6 and the air outlet zone 7, air intake and exhaust do not interfere with each other, preventing heat from the exhaust from being drawn back into the air intake zone 6 and improving heat dissipation. In this embodiment, the front baffle 113 of the housing 11 is located in the air intake zone 6, and the rear baffle 114 of the housing 11 is located in the air outlet zone 7.

[0035] Specifically, refer to Figure 2 An isolation plate 4 is installed on the edge of the radiator 3. The isolation plate 4 includes an upper baffle 41, a side baffle 42, and a lower baffle 43. The upper baffle 41 is installed on the top of the radiator 3, the lower baffle 43 is installed on the bottom of the radiator 3, and the side baffle 42 is installed on the side of the radiator 3 in the lateral direction. In addition, the upper baffle 41, the side baffle 42, and the lower baffle 43 are all provided with clips 44 on the edges away from the radiator 3. The clips 44 abut against the inner wall of the housing 1. The clips 44 can fill the gaps between the upper baffle 41 and the top plate 121 of the cover 12, between the side baffle 42 and the side panel 122 of the cover 12, and between the lower baffle 43 and the bottom plate 111 of the casing 11, further effectively isolating the air inlet area 6 and the air outlet area 7. Figure 3 This is a schematic diagram of the clip adhesive strip 44 on the upper edge of the upper baffle 41.

[0036] In order to achieve air intake, refer to Figures 5-7 In this embodiment, a vent plate 118 is provided on the inner side of the front baffle 113. The vent plate 118 is parallel to the front baffle 113. The front baffle 113 has an air guide 116 opposite to the vent plate 118, and an inclined air guide plate 117 is provided inside the air guide 116. The air guide plate 117 can guide the intake airflow to the vent plate 118 on the one hand, and protect the vent plate 118 on the other hand, preventing mud splashed from the rear tires of the vehicle from clogging the vent plate 118 and reducing the air intake effect of the radiator 3. (Refer to...) Figure 8 and Figure 10The top plate 121 has a semi-ventilation opening 126 spanning the air inlet area 6 and the air outlet area 7. A semi-ventilation plate 127 is detachably connected inside the semi-ventilation opening 126. Several heat dissipation holes 128 are opened in the area of ​​the semi-ventilation plate 127 opposite to the air inlet area 6. The area of ​​the semi-ventilation plate 127 opposite to the air outlet area 7 is completely enclosed to prevent heat from the air outlet area 7 from being instantly drawn into the air inlet area 6 through the heat dissipation holes 128, thus preventing a decrease in heat dissipation effect. Therefore, the air guide 116, the vent plate 118, and the heat dissipation holes 128 can all allow air to enter, and the air inlet area 6 has multiple air intake channels, enhancing the heat dissipation capacity.

[0037] To achieve airflow, refer to Figure 5 In this embodiment, the rear baffle 114 has an air outlet 115. (Refer to...) Figure 8 and Figure 9 The side panel 122 has a full ventilation opening 123, which is connected to the air outlet area 7. A full ventilation plate 124 is detachably installed inside the full ventilation opening 123, and the full ventilation plate 124 has several heat dissipation holes 125. Both the air outlet 115 and the heat dissipation holes 125 can dissipate air, and the multiple heat dissipation channels enable the heat in the air outlet area 7 to be discharged in a timely manner, improving the heat dissipation effect and efficiency.

[0038] In this embodiment, two or more ventilation plates 118 can be provided. Correspondingly, in this embodiment, two or more air guides 116 and a corresponding number of air guides 117 can be provided.

[0039] In order to avoid reducing the structural strength of the side panel 122 due to the excessive size of the full ventilation opening 123, in this embodiment, the full ventilation opening 123 can be designed as two or more small-sized full ventilation openings 123.

[0040] Work process: External cold air enters the air intake area 6 of the casing 1 through two paths: one is through the air guide 116 of the front baffle 113. Under the guidance of the inclined air guide plate 117 in the air guide 116, the airflow is precisely directed to the vent plate 118 parallel to the front baffle 113, and enters the air intake area 6 after being filtered by the vent plate 118; the other is through the semi-ventilation plate 127 in the semi-ventilation opening 126 of the top plate 121. Because the semi-ventilation plate 127 has several heat dissipation holes 128 in the area opposite to the air intake area 6, external cold air can enter the air intake area 6 through these heat dissipation holes 128.

[0041] The cold air entering the air intake zone 6 is drawn in by the radiator 3 to cool the engine 2. After the heat exchange is completed, the hot air is discharged from the air outlet zone 7.

[0042] Since the air inlet area 6 and the air outlet area 7 are separated by the isolation plate 4, which is a frame structure installed on the edge of the radiator 3, consisting of an upper baffle 41, a side baffle 42 and a lower baffle 43, the edges away from the radiator 3 are provided with clips and rubber strips 44 that abut against the inner wall of the housing 1, which can effectively seal the gap between the radiator 3 and the inner wall of the housing 1. Therefore, the isolation plate 4 can prevent hot air from flowing back to the air inlet area 6.

[0043] The hot air from the air outlet 7 is discharged from the housing 1 through two paths: one is through the air outlet 115 opened in the rear baffle 114; the other is through the full ventilation opening 123 of the side panel 122. The full ventilation plate 124 that can be detached and installed in the full ventilation opening 123 has several heat dissipation holes 125, through which the hot air can be discharged.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooling device for an engine of a forklift truck, comprising a housing (1), the housing (1) being capable of accommodating an engine (2), a radiator (3) being disposed inside the housing (1), the radiator (3) and the engine (2) being distributed longitudinally inside the housing (1), characterized in that, The housing (1) is provided with an isolation plate (4). The plate surface of the isolation plate (4) is vertically arranged. One side of the isolation plate (4) faces the radiator (3), and the other side of the isolation plate (4) faces the installation position of the engine (2). The isolation plate (4) is a frame structure. The isolation plate (4) is used to seal the gap between the radiator (3) and the inner wall of the housing (1). The isolation plate (4) can divide the internal space of the housing (1) into an air intake area (6) and an air outlet area (7) in the longitudinal direction.

2. The engine cooling device for a forklift truck according to claim 1, characterized in that, The isolation plate (4) is installed on the edge of the radiator (3). The isolation plate (4) includes an upper baffle (41), a side baffle (42) and a lower baffle (43). The upper baffle (41) is installed on the top of the radiator (3), the lower baffle (43) is installed on the bottom of the radiator (3), and the side baffle (42) is installed on the side of the radiator (3) in the lateral direction.

3. The engine cooling device for a forklift truck according to claim 2, characterized in that, The upper baffle (41), side baffle (42) and lower baffle (43) are all provided with clip strips (44) on the edges away from the radiator (3), and the clip strips (44) abut against the inner wall of the housing (1).

4. The engine cooling device for a forklift truck according to claim 1, characterized in that, The shell (1) is open on one side in the lateral direction and is installed on the side of the chassis (8). The inner wall of the shell (1) and the side of the chassis (8) together form the internal space of the shell (1).

5. The engine cooling device for a forklift truck according to claim 4, characterized in that, The radiator (3) is mounted on the side of the chassis (8) in the lateral direction.

6. The engine cooling device for a forklift truck according to claim 4, characterized in that, The radiator (3) has a sponge (5) on the side of the chassis (8) in the lateral direction, and the sponge (5) abuts against the side of the chassis (8).

7. The engine cooling device for a forklift truck according to claim 4, characterized in that, The housing (1) includes a box (11) and a cover (12); the box (11) includes a horizontally arranged base plate (111), one side of the base plate (111) is connected to the side of the chassis (8) in the transverse direction, and the other side of the base plate (111) is vertically connected to the support plate (112). The base plate (111) has a front baffle (113) and a rear baffle (114) connected to its two sides in the longitudinal direction, respectively. The front baffle (113) is located in the air intake area (6), and the rear baffle (114) is located in the air intake area (6). The air outlet area (7) and the support plate (112) are connected to the front baffle (113) and the rear baffle (114) on both sides in the longitudinal direction, respectively. The cover (12) includes a horizontally arranged top plate (121). The top plate (121) is connected to the chassis (8) in a vertical rotation on one side in the transverse direction. The top plate (121) is connected to the side panel (122) in a vertical rotation on the other side in the transverse direction. The vertical rotation of the top plate (121) can drive the side panel (122) to rotate synchronously to close and open the box (11).

8. The engine cooling device for a forklift truck according to claim 7, characterized in that, A vent plate (118) is provided on the inner side of the front baffle (113). The vent plate (118) is parallel to the front baffle (113). The front baffle (113) has an air guide (116) opposite to the vent plate (118). An inclined air guide plate (117) is provided inside the air guide (116).

9. A forklift engine cooling device according to claim 7, characterized in that, The rear panel (114) has an air outlet (115); the side panel (122) has a full ventilation opening (123), which is connected to the air outlet area (7). A full ventilation plate (124) is detachably installed inside the full ventilation opening (123), and the full ventilation plate (124) has several heat dissipation holes (125).

10. A forklift engine cooling device according to claim 7, characterized in that, The top plate (121) has a semi-ventilation opening (126) that spans the air inlet area (6) and the air outlet area (7). A semi-ventilation plate (127) is detachably connected inside the semi-ventilation opening (126). Several heat dissipation holes (128) are opened in the area of ​​the semi-ventilation plate (127) opposite to the air inlet area (6). The area of ​​the semi-ventilation plate (127) opposite to the air outlet area (7) is completely enclosed.

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